// Sets the uniform using the top-left 3x3 submatrix of the provided 4x4 matrix.
 public void SetSubroutineUniformMat3x3(string uniformName, Matrix4x4 value)
 {
     if (m_actorInterface != null)
     {
         m_actorInterface.SetSubroutineUniformMat3x3(uniformName, value);
     }
 }